package io;

import java.io.*;
import java.util.Scanner;

public class Demo12 {
    public static void main(String[] args) {
        //输入必要的的信息
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入要复制的文件路径");

        String srcPath = scanner.next();

        System.out.println("请输入要复制到的目标路径");
        String destPath = scanner.next();


        //验证上面路径是否合法
        File srcFile = new File(srcPath);
        if (!srcFile.isFile()) {
            System.out.println("输入的腰复制的文件路径非法!");
            return;
        }

        File destFile = new File(destPath);
        if (!destFile.getParentFile().isDirectory()) {
            System.out.println("输入的目标路径非法!");
            return;
        }

        //读写文件
        try(InputStream inputStream = new FileInputStream(srcFile)) {

            OutputStream outputStream = new FileOutputStream(destFile);
            while (true) {
                byte[] bytes = new byte[1024];
                int n = inputStream.read(bytes);
                if (n == -1) {
                    break;
                }
                outputStream.write(bytes,0,n);
            }

        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }
}
